服務端接受文件流並處理

public void doPost(HttpServletRequest request, HttpServletResponse response)     throws ServletException, IOException {

    final int NONE=0;

    final int DATAHEADER=1;

    final int FILEDATA=2;

    final int FIELDDATA=3;

    //將請求消息的實體送到b變量中

    int TotalBytes=request.getContentLength();

    byte[] b=new byte[TotalBytes];

    String contentType=request.getContentType();//請求消息類型

    String fieldname="";                        //表單域的名稱

    String fieldvalue="";                       //表單域的值

    String filename="";                         //文件名

    String boundary="";                         //分界符

    String lastboundary="";                     //結束符

    int filesize=0;                             //文件長度

    Hashtable<String, String> formfields=new Hashtable<String, String>();

    int pos=contentType.indexOf("boundary=");

    //String fileID;  //上傳的文件ID

    if(pos!=-1)     //取得分界符和結束符

    {

      pos+="boundary=".length();

      boundary="--"+contentType.substring(pos);

      lastboundary=boundary+"--";

    }

    int state=NONE;

    //得到數據輸入流reqbuf

    DataInputStream in=new DataInputStream(request.getInputStream());

    in.readFully(b);

    in.close();

    String reqContent=new String(b,"UTF-8");//********如果文件過大會造成內容溢出，但是如果沒有讀入全部，又無法過濾消息頭而得到內容字節數組*********/

    BufferedReader reqbuf=new BufferedReader(new StringReader(reqContent));

    boolean flag=true;

    int i=0;

    while(flag==true)

    {

      String s=reqbuf.readLine();

      if((s==lastboundary)||(s==null)) break;

      switch(state)

      {

         case NONE:

            if (s.startsWith(boundary))

              {

                 state=DATAHEADER;

                 i+=1;

              }

              break;

         case DATAHEADER:

            pos=s.indexOf("filename=");

            if (pos==-1)

            {                           //將表單域的名字解析出來

              pos=s.indexOf("name=");

              pos+="name=".length()+1;

              s=s.substring(pos);

              int l=s.length();

              s=s.substring(0,l-1);

              fieldname=s;

              state=FIELDDATA;

            }

            else

            {                           //將文件名解析出來

              String temp=s;

              pos=s.indexOf("filename=");

              pos+="filename=".length()+1;

              s=s.substring(pos);

              int l=s.length();

              s=s.substring(0,l-1);

              pos=s.lastIndexOf("\\");

              s=s.substring(pos+1);

              filename=s;

                                       //從字節數組中取出文件數組

              pos=byteIndexOf(b,temp,0);

              b=subBytes(b,pos+temp.getBytes().length+2,b.length);//去掉前面的部分

              s=reqbuf.readLine();

              b=subBytes(b,s.getBytes().length+4,b.length);

              pos=byteIndexOf(b,boundary,0);

              b=subBytes(b,0,pos-1);

              File f=new File(formfields.get("FilePath")+"\\"+filename);  //寫入文件

              DataOutputStream fileout=new DataOutputStream(new FileOutputStream(f));

              fileout.write(b,0,b.length-1);

              filesize=b.length-1;

              state=FILEDATA;

            }

            break;

         case FIELDDATA:

            s=reqbuf.readLine();

            fieldvalue=s;

            formfields.put(fieldname,fieldvalue);

            state=NONE;

            break;

         case FILEDATA:

            while((!s.startsWith(boundary))&&(!s.startsWith(lastboundary)))

            {

               s=reqbuf.readLine();

               if (s.startsWith(boundary))

               {

                  state=DATAHEADER;

                  break;

               }

            }

            break;

      }

    }

    }


客戶端的方法 ：
android端：
MultipartEntity entity = new MultipartEntity();
ContentBody fileBody = new FileBody(file);
entity.addPart("file", fileBody);
ContentBody signBody = new StringBody("dolemifasolaxi");
entity.addPart("SIGN", signBody);
ContentBody imeiBody = new StringBody("xilasofamiledo");
entity.addPart("IMEI", imeiBody);
服務器代碼：
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
CommonsMultipartFile file = (CommonsMultipartFile) multipartRequest.getFile("file");
String imei = multipartRequest.getParameter("IMEI");
System.out.println("imei:" + imei);
String sign = multipartRequest.getParameter("SIGN");
System.out.println("sign:" + sign);


以文件的形式傳參
/**
* 通過拼接的方式構造請求內容，實現參數傳輸以及文件傳輸
*
* @param actionUrl 訪問的服務器URL
* @param params 普通參數
* @param files 文件參數
* @return
* @throws IOException
*/
public static void post(String actionUrl, Map<String, String> params, Map<String, File> files) throws IOException
{

String BOUNDARY = java.util.UUID.randomUUID().toString();
String PREFIX = "--", LINEND = "\r\n";
String MULTIPART_FROM_DATA = "multipart/form-data";
String CHARSET = "UTF-8";

URL uri = new URL(actionUrl);
HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
conn.setReadTimeout(5 * 1000); // 緩存的最長時間
conn.setDoInput(true);// 允許輸入
conn.setDoOutput(true);// 允許輸出
conn.setUseCaches(false); // 不允許使用緩存
conn.setRequestMethod("POST");
conn.setRequestProperty("connection", "keep-alive");
conn.setRequestProperty("Charsert", "UTF-8");
conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);

// 首先組拼文本類型的參數
StringBuilder sb = new StringBuilder();
for (Map.Entry<String, String> entry : params.entrySet())
{
sb.append(PREFIX);
sb.append(BOUNDARY);
sb.append(LINEND);
sb.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"" + LINEND);
sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);
sb.append("Content-Transfer-Encoding: 8bit" + LINEND);
sb.append(LINEND);
sb.append(entry.getValue());
sb.append(LINEND);
}

DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
outStream.write(sb.toString().getBytes());
InputStream in = null;
// 發送文件數據
if (files != null)
{
for (Map.Entry<String, File> file : files.entrySet())
{
StringBuilder sb1 = new StringBuilder();
sb1.append(PREFIX);
sb1.append(BOUNDARY);
sb1.append(LINEND);
// name是post中傳參的鍵 filename是文件的名稱
sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\"" + file.getKey() + "\"" + LINEND);
sb1.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINEND);
sb1.append(LINEND);
outStream.write(sb1.toString().getBytes());

InputStream is = new FileInputStream(file.getValue());
byte[] buffer = new byte[1024];
int len = 0;
while ((len = is.read(buffer)) != -1)
{
outStream.write(buffer, 0, len);
}

is.close();
outStream.write(LINEND.getBytes());
}

// 請求結束標誌
byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();
outStream.write(end_data);
outStream.flush();
// 得到響應碼
int res = conn.getResponseCode();
if (res == 200)
{
in = conn.getInputStream();
int ch;
StringBuilder sb2 = new StringBuilder();
while ((ch = in.read()) != -1)
{
sb2.append((char) ch);
}
}
outStream.close();
conn.disconnect();
}
// return in.toString();
}

以數據流的形式傳參
public static String postFile(String actionUrl, Map<String, String> params, Map<String, byte[]> files)
throws Exception
{
StringBuilder sb2 = null;
String BOUNDARY = java.util.UUID.randomUUID().toString();
String PREFIX = "--", LINEND = "\r\n";
String MULTIPART_FROM_DATA = "multipart/form-data";
String CHARSET = "UTF-8";

URL uri = new URL(actionUrl);
HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
conn.setReadTimeout(6 * 1000); // 緩存的最長時間
conn.setDoInput(true);// 允許輸入
conn.setDoOutput(true);// 允許輸出
conn.setUseCaches(false); // 不允許使用緩存
conn.setRequestMethod("POST");
conn.setRequestProperty("connection", "keep-alive");
conn.setRequestProperty("Charsert", "UTF-8");
conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);

// 首先組拼文本類型的參數
StringBuilder sb = new StringBuilder();
for (Map.Entry<String, String> entry : params.entrySet())
{
sb.append(PREFIX);
sb.append(BOUNDARY);
sb.append(LINEND);
sb.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"" + LINEND);
sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);
sb.append("Content-Transfer-Encoding: 8bit" + LINEND);
sb.append(LINEND);
sb.append(entry.getValue());
sb.append(LINEND);
}

DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
outStream.write(sb.toString().getBytes());
InputStream in = null;
// 發送文件數據
if (files != null)
{
for (Map.Entry<String, byte[]> file : files.entrySet())
{
StringBuilder sb1 = new StringBuilder();
sb1.append(PREFIX);
sb1.append(BOUNDARY);
sb1.append(LINEND);
sb1.append("Content-Disposition: form-data; name=\"pic\"; filename=\"" + file.getKey() + "\"" + LINEND);
sb1.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINEND);
sb1.append(LINEND);
outStream.write(sb1.toString().getBytes());

// InputStream is = new FileInputStream(file.getValue());
// byte[] buffer = new byte[1024];
// int len = 0;
// while ((len = is.read(buffer)) != -1)
// {
// outStream.write(buffer, 0, len);
// }
// is.close();
outStream.write(file.getValue());

outStream.write(LINEND.getBytes());
}

// 請求結束標誌
byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();
outStream.write(end_data);
outStream.flush();
// 得到響應碼
int res = conn.getResponseCode();
if (res == 200)
{
in = conn.getInputStream();
int ch;
sb2 = new StringBuilder();
while ((ch = in.read()) != -1)
{
sb2.append((char) ch);
}
System.out.println(sb2.toString());
}
outStream.close();
conn.disconnect();
// 解析服務器返回來的數據
return ParseJson.getEditMadIconResult(sb2.toString());
}
else
{
return "Update icon Fail";
}
// return in.toString();
}





大家好，以下是我的解決方法，不知道是否能解決你們的問題，另外這個需要2個jar文件，請下載附件
HttpPost httpPost = new HttpPost(url);
MultipartEntity reqEntity = new MultipartEntity();
if (!imageurl.equals("")) {
FileBody file = new FileBody(new File(imageurl));
reqEntity.addPart("pic", file);
}

StringBody gold1 = new StringBody(gold);
StringBody content1 = new StringBody(content);
StringBody part1 = new StringBody(partId);

reqEntity.addPart("gold", gold1);
reqEntity.addPart("content", content1);
reqEntity.addPart("part", part1);
/*
* List<NameValuePair> params = new ArrayList<NameValuePair>();
* params.add(new BasicNameValuePair("gold", gold)); params.add(new
* BasicNameValuePair("content", content)); params.add(new
* BasicNameValuePair("part", partId));
*/
httpPost.setEntity(reqEntity);